[2.x] React to Compressor changes from core from #9262 (#3221)

### Description

Reacting to changes from the backport of
opensearch-project/OpenSearch#9262.

This reason the main branch of Security is not encountering these errors
is because the affected class was removed in
#2900 and the change
has not been backported yet.

@willyborankin are you planning to backport
#2900?

* Category (Enhancement, New feature, Bug fix, Test fix, Refactoring,
Maintenance, Documentation)

Maintenance

### Check List
- [ ] New functionality includes testing
- [ ] New functionality has been documented
- [ ] Commits are signed per the DCO using --signoff

By submitting this pull request, I confirm that my contribution is made
under the terms of the Apache 2.0 license.
For more information on following Developer Certificate of Origin and
signing off your commits, please check
[here](https://github.com/opensearch-project/OpenSearch/blob/main/CONTRIBUTING.md#developer-certificate-of-origin).

Signed-off-by: Craig Perkins <[email protected]>

src/main/java/org/opensearch/security/dlic/rest/validation/CredentialsValidator.java

@@ -14,7 +14,7 @@
 import java.util.Map;
 
 import org.opensearch.core.common.bytes.BytesReference;
-import org.opensearch.core.common.compress.NotXContentException;
+import org.opensearch.core.compress.NotXContentException;
 import org.opensearch.common.settings.Settings;
 import org.opensearch.common.xcontent.XContentHelper;
 import org.opensearch.common.xcontent.XContentType;